Speaker



FIG. 1 is a perspective view of a speaker, showing our new design;

FIG. 2 is the front elevational view thereof;

FIG. 3 is the rear elevational view thereof;

FIG. 4 is the left-side view thereof;

FIG. 5 is the right-side view thereof;

FIG. 6 is the top view thereof; and,

FIG. 7 is the bottom view thereof.

The broken lines shown in the drawings depict portions of the speaker that form no part of the claimed design. 

CLAIM The ornamental design for a speaker, as shown and described. 